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Thanks Colin and Donels - yep, exactly that one I have booked marked. Maybe expensive but not as much as the conversion, and by all accounts if the pump is basically good, maybe a cheap price to pay to protect its weak spot.
You fortunately missed a lot of the fitment issues associated with the Burton pump by using a toothed belt system. I’d be interested to know what the gearing ratio is though with that toothed drive - i.e crank speed to water pump to alternator speed ratio. It doesn’t look like the standard ratio which may or may not make it ok for a road engine.
Tony Ingram
Lotus7.com
On sale $695
That one is the Burton pump.
Can the belt tensioning bracket on the top of the alternator be fitted the other way up? If so, it might make for a neater installation - it looks a bit strange the way you have it fitted.
Just fit a twin pulley to drive the alternator and a separate loose one to drive the water pump. No failures in around 80k miles…
Does any one sell a dual crank shaft pulley of the shelf?
I just had one turned up by a good engineering firm - works a treat!! Note - you need an extended alternator pulley also. I will look out my old drawings and post them.
Here we go!!! These are my original drawings. I hope that they make sense! Lining up the alternator is a bit of fiddling here and there with washers and spacers and so on – but very simple. Just needs to be spot on to avoid belt wear. I gave the machine shop and old crank shaft pulley to copy to get all the dimensions right and all they had to do was machine the new one up with a second pulley grove. I enclose a couple of photographs to give you idea. You have to take the water pump pulley off to fit the belt.
Good luck!
Ok thanks. At some point I plan to fit ac to my car, so will need a dual pulley for that. I was hoping to avoid the hassle off getting one made but can get that done if needed.